  * {
    margin: 0;
    padding: 0;

}

body {
    background-color: #f3f5f7;

}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

.w {
    width: 1200px;
    margin: auto;
}

.header {
    height: 42px;
    /* 注意这里会层叠掉上面的 .w 里面的margin */
    margin: 30px auto;
}

.logo {
    width: 195px;
    height: 42px;
    float: left;
}

/* 导航栏部分 */
.nav {
    float: left;
    margin-left: 60px;
}

.nav ul li {
    float: left;
    margin: 0 15px;
}

.nav ul li a {
    display: block;
    height: 42px;
    padding: 0 10px;
    line-height: 42px;
    font-size: 18px;
    color: #050505;
    text-decoration: none;
}

.nav ul li a:hover {
    border-bottom: 2px solid #00a4ff;
    color: #00a4ff;
}

/* 搜索模块 */
.search {
    float: left;
    width: 412px;
    height: 42px;
    margin-left: 70px;
}

/* 文本框 */
.search input {
    float: left;
    width: 345px;
    height: 40px;
    border: 1px solid #00a4ff;
    border-right: none;
    font-size: 14px;
    color: #bfbfbf;
    padding-left: 15px;
}

#images1 {
    vertical-align: middle;
}

/* 图片中部对齐 */

/* 按钮 */
.search button {
    float: left;
    width: 50px;
    height: 42px;
    background-image: url(./images/btn.png);
    /* 按钮有个边框需要我们手动去掉 */
    border: none;
}

/* 用户模块 */
.user {
    float: right;
    line-height: 42px;
    margin-right: 30px;
    font-size: 14px;
    color: #666;
}


/* 版心模块 */
.banner {
    height: 420px;
    background-color: #1c036c;
}

.banner .w {
    height: 420px;
    background: url(./images/banner2_20190819_210028.png)no-repeat top center;
}

.subnav {
    float: left;
    height: 420px;
    width: 190px;
    background-color: rgba(0, 0, 0, .4);
}

.subnav ul li {
    line-height: 45px;
    padding: 0 20px;
}

.subnav ul li a {
    color: #fff;
    font-size: 14px;
}

/* 将大于号浮动向右 */
.banner ul li a span {
    float: right;
}

.subnav ul li a:hover {
    color: #00b4ff;
}

/* 课程表模块 */
.course {
    float: right;
    height: 300px;
    width: 230px;
    background-color: #fff;
    float: right;
    /* 浮动的盒子不会有外边合并的问题 */
    margin-top: 50px;
}

.course h2 {
    height: 48px;
    background-color: #9bceea;
    text-align: center;
    line-height: 48px;
    color: #ffffff;
    font-size: 18px;
}

.bd {
    padding: 0 20px;
}

.bd ul li {
    padding: 14px 0;
    border-bottom: 1px solid #ccc;
}

.bd ul li h4 {
    font-size: 16px;
    color: #4e4e4e;
}
.bd ul li h4:hover{
font-weight: 900;
color: #00b4ff;
}

.bd ul li p {
    font-size: 12px;
    color: #a5a5a5;
}

/* 课程按钮 */
.bd .maro {
    display: block;
    height: 38px;
    border: 1px solid #00a4ff;
    line-height: 38px;
    text-align: center;
    color: #00a4ff;
    font-weight: 700;
    margin-top: 5px;
}


/* 精品模块 */
.goos {
    width: 1200px;
    height: 60px;
    margin-top: 8px;
    box-shadow: 0 2px 3px 3px rgba(0, 0, 0, 0.1);
    /* 孩子们会继承行高,所以只用给父亲设置 */
    line-height: 60px;
}

.goos h3 {
    float: left;
    font-size: 16px;
    color: #00a4ff;
    margin-left: 34px;
}

.goos ul {
    float: left;
    margin-left: 30px;
}

.goos ul li {
    float: left;
}

.goos ul li a {
    padding: 0 30px;
    font-size: 16px;
    color: #050505;
    border-left: 1px solid #ccc;
}

.goos .mod {
    float: right;
    font-size: 14px;
    color: #00a4ff;
    margin-right: 30px;
}

.goos ul li a:hover {
    color: #00a4ff;
}

/* box核心区域 */
.box {
    margin-top: 20px;
}

.box-hd {
    height: 45px;

}

.box .box-hd h1 {
    float: left;
    font-size: 20px;
    font-weight: 500;
    color: #494949;
}

.box .box-hd a {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px;
}

.box-bd ul {
    width: 1225px;
}

/* 把li的父亲ul修改的的足够宽 一行能装下5个盒子就不会换行了 */
.box-bd ul li {
    float: left;
    height: 270px;
    width: 230px;
    background-color: #fff;
    margin-right: 15px;
    margin-bottom: 15px;

}

.box-bd ul li img {
    width: 100%;
}

.box-bd ul li h4 {
    margin: 25px 24px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}

.box-bd ul li h4:hover {
    font-weight: 600;
}


.box-bd .info {
    margin: 0 20px 0 25px;
    font-size: 12px;
    color: #999999;
}

.box-bd .info span {
    color: #ff7c2d;
}

.box-bd ul li img:hover {
    border: 4px solid #00b4ff;
}

/* 编程入门 */
.happt {
    width: 1200px;
    height: 45px;
    margin-bottom: 8px;
    line-height: 45px;
}

.happt h1 {
    float: left;
    font-size: 20px;
    font-weight: 500;
    color: #494949;
}

.happt ul {
    margin-left: 355px;
}

.happt ul li a {
    font-size: 16px;
    color: #868686;
    float: left;
    margin-left: 70px;
}

.happt ul li a:hover {
    color: #00a4ff;
}

.happt .hpt-d {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px
}

/* 快乐编程模块 */
.php-d {

    height: 392px;
    margin-bottom: 20px;
}

.php-b {
    float: left;
    width: 230px;
    height: 392px;
}

.php-top {
    float: left;
    width: 957px;
    height: 100px;
    background-color: #ff7c2d;
    margin: 0 0 20px 12px;
}

.php-bottom .ull li {
    float: left;
    height: 270px;
    width: 230px;
    background-color: #fff;
    margin-left: 12px;
    margin-bottom: 20px;

}

.php-bottom .ull {
    width: 1225px;
}

.php-bottom .ull li img {
    width: 100%;
}

.php-bottom .ull li h4 {
    margin: 25px 24px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}

.php-bottom .ull li .info {
    font-size: 12px;
    color: #999999;
    margin: 0 20px 0 25px;
}

.php-bottom .ull li .info span {
    font-size: 12px;
    color: #ff7c2d;

}

.php-bottom .ull li img:hover {
    border: 4px solid #00a4ff;
}

.php-bottom ul li h4:hover {
    font-weight: 600;
}

/* 数据分析师 */
.pwp-d {

    height: 392px;
    margin-bottom: 20px;
}

.pwp-b {
    float: left;
    width: 230px;
    height: 392px;
}

.pwp-top {
    float: left;
    width: 957px;
    height: 100px;
    background-color: #ff7c2d;
    margin: 0 0 20px 12px;
}

.pwp-bottom .ull li {
    float: left;
    height: 270px;
    width: 230px;
    background-color: #fff;
    margin-left: 12px;
    margin-bottom: 20px;

}

.pwp-bottom .ull {
    width: 1225px;
}

.pwp-bottom .ull li img {
    width: 100%;
}

.pwp-bottom .ull li h4 {
    margin: 25px 24px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}

.pwp-bottom .ull li .info {
    font-size: 12px;
    color: #999999;
    margin: 0 20px 0 25px;
}

.pwp-bottom .ull li .info span {
    font-size: 12px;
    color: #ff7c2d;

}

.pwp-bottom .ull li img:hover {
    border: 4px solid #00a4ff;
}

.pwp-bottom ul li h4:hover {
    font-weight: 600;
}

/* 机器学习工程师 */
.center {
    width: 1200px;
    height: 45px;
    margin-bottom: 8px;
    line-height: 45px;
}

.center h1 {
    float: left;
    font-size: 20px;
    font-weight: 500;
    color: #494949;
}

.center ul {
    margin-left: 355px;
}

.center ul li a {
    font-size: 16px;
    color: #868686;
    float: left;
    margin-left: 70px;
}

.center ul li a:hover {
    color: #00a4ff;
}

.center .bott {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px
}


/* 机器学习工程师box模块  */
.padd{
    height: 270px;
}
.padd .pass{
    float: left;
    width: 1225px;
    padding-bottom: 20px;
}
.padd .pass li{
    float: left;
    height: 270px;
    width: 230px;
    background-color: #fff;
    margin-right: 15px;
    margin-bottom: 15px;
}
.padd li img{
    width: 100%;
}
.padd .pass li h4 {
    margin: 25px 24px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}

.padd .pass li .info {
    font-size: 12px;
    color: #999999;
    margin: 0 20px 0 25px;
}

.padd .pass li .info span {
    font-size: 12px;
    color: #ff7c2d;

}

.padd .pass li img:hover {
    border: 4px solid #00a4ff;
}

.padd ul li h4:hover {
    font-weight: 600;
}
/* 机器学习工程师box模块结束 */



/* 底部模块 */
/* 清除ul浮动 */
.clearfix:before,
.clearfix:after {
    content: "";
    display: table;
}

.clearfix:after {
    clear: both;
}

.clearfix {
    *zoom: 1;
}


.footer {
    height: 415px;
    background-color: #fff;
    margin-top:20px ;

}

.footer .w {
    padding-top: 35px;
}

.copyright {
    float: left;

}

.copyright p {
    font-size: 12px;
    color: #666;
    margin: 20px 0 15px 0;
}

.copyright .app {
    display: block;
    width: 118px;
    height: 33px;
    border: 1px solid #00a4ff;
    text-align: center;
    line-height: 33px;
    color: #00a4ff;
    font-size: 16px;
}

.copyright .app:hover {
    background-color: rgba(57, 176, 241, 0.5);
}

.links {
    float: right;
}

.links dl {
    float: left;
    margin-left: 100px;
}

.links dl dt {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.links dl dd a {
    color: #333;
    font-size: 12px;
}
/* 底部模块结束 */


/* 左边导航栏 */
.inpent{
    width: 185px;
    height: 455px;
    background-color: pink;
    float: left;
    margin:20px 20px 20px 100px ;
    
}


/* 左边导航栏结束 */